A local MCP server. Ask Codex to review what Claude Code just wrote, or the other way round. The answer arrives as a new turn. No copying text between windows.
postbag is an MCP project maintained in the parasxos/postbag repository. The maintainer describes its purpose as “A local MCP server. Ask Codex to review what Claude Code just wrote, or the other way round. The answer arrives as a new turn…”. Read the project documentation for the complete scope.
Project documentation · Repository · Discovery listing. This profile records the public documentation checked on 2026-10-08.
Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| postbag_join | Registers this session under a name in a bag, creating the bag if needed. |
| postbag_send | Sends a letter to a name in the bag. final: true asks for no reply. |
| postbag_read | Pages through the bag's history. |
| postbag_bags | Lists local bags with letter counts and registered names. |
| postbag_leave | Withdraws this session from the bag. History stays. |
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